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MathNet 2010 — Part 03 Question 134

Math Olympiad Vault · MathNet 2010 — Part 03

Question 134

What is the second digit (starting from the left) of the number $\left(10^{16}+1\right)\left(10^{8}+1\right)\left(10^{4}+1\right)\left(10^{2}+1\right)(10+1)$?
  1. 0
  2. 1
  3. 2
  4. 3
  5. 4.